We associate a successful cleansing of the skin with the fact that it feels tight afterward. Then we have removed all excess fat and dirt. But, in fact, the excess oil is your skin's protective barrier . Therefore, if the skin is cleansed daily until it becomes tight, expose it to constant degreasing.
This degreasing is not favorable for your skin, and that is what is meant by stripping it of moisture. In the long run, it is disruptive and, in the extreme, this results in the skin overcompensating for the fat that is constantly being removed. This results in an unbalanced skin.